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.ao     / .on     mo vaience electrons for the elements of the first
H 1.0							He 1.70
Li 1.30	Be 1.95	B 2.60	C .3.25	N 3.90	O 4.55	F 5.20	Ne 5.85
Na 2.20	Mg 2.85	Al 3.50	Si 4.15	P 4.80	s 5.45.	CI 6.10	Ar 6.75
K 2.20	Ca 2.85	Ga 5.00	Gc 5.65	As 6.30	Sc 6.95	Br 7.60	Kr 8.25
Rb 2.20	Sr 2.85	In 5.00	Sn 5.65	Sb 6.30	Te 6.95	I 7.60	Xe 8.25
Table 2.3: Atomic radii (in pm) calculated using equation (41).
H 53			=	z* ,			He 31
Li	Be	B	C	N	o	F	. Ne
163	109	82	65	55	47	41	36
Na	Mg	Al	Si	P	S	CI	Ar
217	168	137	115	100	88	78	71
K	Ca	Ga	Ge	As •	Se	Br	Kr
332	256	146	129	116	105	96	88
Rb	Sr	In	Sn	Sb	Te	I	Xe
386	300	. 171	151	135	122	112	103
Malronj
60   INTRODUCTION TO ATOMIC AND MOLECULAR STRUCTURE
Table 2.4: Valence orbital energies expressed in eV.
	H							He
Is	-13.6							-24.6
	Li	Be	B	C	N	O	F	Ne
2s	-5.4	-9.4	-14.7	-19.4	-25.6	-32.4	-40.1	-48.4
2p	—	—	-5.7	-10.7	-12.9	-15.9	-18.6	-21.6
	Na	Mg	Al	Si	P	S	CI	Ar
33	-5.2	-7.6	-11.3	-15.0	-18.4	-20.9	-25.3	-29.2
3p	—		-6.0	-7.8	-9.8	—11.7	-13.7	-15.8
	K	Ca	Ga	Ge	As	Se	Br	Kr
4s	-4.4	-6.1	-12.6	-15.6	-17.7	-20.9	-24.5	-27.2
Ap	—		-6.0	-7.5	-9.2	-1Ö.9 J	-12.6	-14.0
62   INTRODUCTION TO ATOMIC AND MOLECULAR STRUCTURE
Table 2.5: Ionization potentials expressed in eV.
1
18
H 13.6	2	13	14	15 .	16	17	He 24.6
Li 5.4	Be 9.3	B 8.3	c 11.3	N 14.5	O 13.6	F 17.4	Ne 21.6
Na 5.1	Mg 7.6	AI 6.0	Si 8.2	P 10.5	S 10.4	CI 13.0	Ar 15.8
K 4,3	Ca 6.1	Ga 6,0	Ge 7.9	As 9.8	Se 9.8	Br 11.8	Kr 14.0
Rb 4,2	Sr 5.7	In 5.8	Sn 7,3	Sb 8,6	Te 9.0	I 10.5	Xe 12.1